CN201302893Y - Superconducting magnet power supply achieved by IGBT - Google Patents
Superconducting magnet power supply achieved by IGBT Download PDFInfo
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- CN201302893Y CN201302893Y CNU2008202225781U CN200820222578U CN201302893Y CN 201302893 Y CN201302893 Y CN 201302893Y CN U2008202225781 U CNU2008202225781 U CN U2008202225781U CN 200820222578 U CN200820222578 U CN 200820222578U CN 201302893 Y CN201302893 Y CN 201302893Y
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- power supply
- current
- superconducting magnet
- igbt
- closed loop
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Abstract
The utility model discloses a superconducting magnet power supply which is achieved by an insulated gate bipolar transistor, wherein four insulated gate bipolar transistor decompression chopper circuits A8, A9, A10, A11 with closed-loop regulating controllers are connected in parallel, a phase shift double frequency control technique is used, output voltage (current) ripples are reduced, burden of passive filtering is lightened, and dynamic response property of power supply regulation is improved, thereby improving the stability of output current. A current negative feedback closed ring control with stable performance, low temperature drift and high precision, which is specially designed according to the characteristics of zero resistance and big electric inductance of a superconducting magnet, leads the output current of a power supply to have higher stability.
Description
Technical field
The utility model belongs to a kind of superconducting magnet power supply, particularly a kind of superconducting magnet field power supply based on big capacity IGBT (Insulated-Gate Bipolar Transistor, igbt) device.
Background technology
At key areas such as basic scientific research, health care, track traffic, national defense industry, need supply with exciting current to magnet with the stabilized current power supply of big electric current usually, during these are used all the stability to magnetic field strict demand has been proposed.Guarantee the long-term stability in magnetic field, will guarantee that exactly the output current of stabilized current power supply has very high stability and extremely low voltage (electric current) ripple.Current, international high-energy physics and nuclear physics research device---particle accelerator system more and more uses superconductor to make magnet.Superconducting magnet is very responsive to voltage (electric current) ripple; excessive voltage (electric current) ripple not only can false triggering quench detector; and may cause that (quench is meant that superconductor enters from superconducting state and often leads attitude the superconducting line quench; superconducting line never resistance becomes resistance is arranged; the electric current process will produce heat during this zone); this will have a strong impact on the operate as normal of superconducting magnet and quench protection system thereof, be fatal for the reliably working of superconducting magnet.Therefore, not only require the current ripples of superconducting magnet power supply extremely low, and the needs response is fast, degree of regulation is high.
At present, the general Thyristor Controlled rectifier power sources that adopt of known superconducting magnet power supply more, it is made up of links such as thyristor rectifier, passive filtering, adjusting controls, and the power supply of this routine has the advantages that capacity is big, system configuration simple, the controllable devices price is low and easily realize the magnetic field energy feedback.But imbalance, the rectifier cell of ac grid voltage open/inconsistent, the factor such as part characteristic is undesirable of turn-off characteristic, all can produce non-feature time voltage (electric current) harmonic wave, and it is big to directly translate into output voltage (electric current) ripple.If adopt passive filter to eliminate voltage (electric current) feature and non-feature subharmonic, can cause passive filter bulky, increased the cost of power supply, and the dynamic property of system is worsened.In order to solve the big problem of Thyristor Controlled rectifier power source output voltage (electric current) ripple, existing superconducting magnet power supply product adopts the linear method of adjusting pipe (large power triode) of series connection in main circuit more, the advantage of this type of power supply is that ripple is little, stability is high, and shortcoming is that the power consumption of linear adjustment pipe is big, efficient is low, volume is big, poor reliability.Another kind of feasible way is to adopt the active power filtering technology, can offset feature and non-feature subharmonic effectively, but this scheme causes the frequency-selective network designing and calculating difficulty of control system owing to non-feature subharmonic spectrum complex, and the field adjustable workload is very big.
Summary of the invention
The purpose of this utility model is the shortcoming that overcomes above-mentioned prior art, and a kind of long-term current stability, height, voltage (electric current) ripple is low, response is fast, degree of regulation is high, volume is little, efficient is high supply unit are provided.
For solving above-mentioned technical problem, this superconducting magnet power supply adopts following technical scheme:
A kind of superconducting magnet power supply, it comprises that four the tunnel have the igbt buck circuit A of closed-loop adjustment controller
8, A
9, A
10, A
11, it is characterized in that described four the tunnel have the igbt buck circuit A of closed loop controller
8, A
9, A
10, A
11For being arranged in parallel, closed loop controller is current-sharing closed loop controller A1, and described current-sharing closed control circuit carries out feedback control copped wave to buck circuit respectively.
The superconducting magnet power supply circuit is provided with total closed loop controller A2, and described total closed loop controller carries out feedback control to circuit integral body.
Beneficial effect of the present invention:
For superconducting magnet provides long-term current stability, height, voltage (electric current) ripple is low, response is fast, degree of regulation is high direct current steady current.The volume of device is little, efficient is high, noise is little.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
A kind of as shown in Figure 1 superconducting magnet power supply of realizing with igbt, it comprises that four the tunnel have the igbt buck circuit A of closed-loop adjustment controller
8, A
9, A
10, A
11, it is characterized in that described four the tunnel have the igbt buck circuit A of closed loop controller
8, A
9, A
10, A
11For being arranged in parallel, closed loop controller is the current-sharing closed loop controller, and described current-sharing closed control circuit carries out feedback control copped wave to buck circuit respectively.
The superconducting magnet power supply circuit is provided with total closed loop controller, and described total closed loop controller carries out feedback control to circuit integral body.
Operation principle of the present invention is: total closed loop controller A2 produces a high frequency clock signal, through minute frequency displacement be processed into four the tunnel each other phase shift be the triangular wave in 1/4 cycle.Current reference signal and current sensor U
3The signal of output compares, and obtains an error signal, and this error signal is amplified with total closed-loop regulator, sends into current-sharing closed loop controller A1 then, with four road buck circuit A
8, A
9, A
10, A
11The signal of output compares and obtains four error signals, with aforementioned four the tunnel each other phase shift be that the triangular wave in 1/4 cycle compares, form four road PWM (Pulse Width Modulation, pulse-width modulation) signal, this four road pwm signal is connected to buck circuit A successively respectively
8, A
9, A
10, A
11The grid of middle IGBT drives buck circuit work.
The oscillator of regulating among the control unit A2 produces a high frequency clock signal, through processing such as frequency division, phase shift generation 4 tunnel each other phase shift be the triangular wave in 1/4 cycle.With the electric current on the high precision electric current transducer U3 collection DC leadout, the low temperature that the current signal of gained is sent among the A2 floats error amplifier, compares with the given reference signal of electric current.With the output of error amplifier modulation signal as pulse-width modulation, compare with triangular wave, thereby obtain PWM (Pulse Width Modulation, pulse-width modulation) signal, the IGBT that goes to control in the buck circuit with this pwm signal carries out copped wave.When average anode current raises owing to input voltage or load impedance when reducing to raise, the output of error amplifier reduces, the pulsewidth of pwm signal reduces to make output voltage decline, output current to reduce, thereby the holding current feedback signal equals the given reference signal of electric current.This negative feedback is controlled at that output current descends owing to input voltage or load impedance increases and works too when descending.At this moment, the output of error amplifier increases, and the pulsewidth of pwm signal increases increases output voltage rising, output current, thereby the holding current feedback signal equals the given reference signal of electric current.This just at superconducting magnet zero resistance, big inductance characteristics and the low temperature of the stable performance that designs floats, the control of current with high accuracy negative feedback closed loop makes the output current of power supply have very high stability.
The pwm signal that produces with said method phase shift each other was 1/4 cycle, if the frequency of every road pwm signal is 10kHz, then the switching frequency that obtains in the stack of C13 anode among the figure is 40kHz, and this method is called as phase shift frequency multiplication control technology.Because 4 road pwm signals phase shift each other were 1/4 cycle, and were 4 overtones bands at summing point.So just increase the pulse number of output voltage, and reduced output voltage (electric current) ripple, accelerated the governing response speed of power supply.Because the application of frequency doubling technology, the operating frequency of passive filter are greatly enhanced (40kHz that is increased to output as 10kHz) from every road.According to electromagnetism knowledge as can be known, so both reduce the capacity of passive filter, reduced its volume again.
This superconducting magnet power supply adopts equalizing controller to carry out the precise current sharing control to 4 road buck circuits, give full play to the fan-out capability of each Buck Chopper bridge, the waste of power device capacity when avoiding the nature current-sharing, reduce purchase cost, also further improved the degree of regulation of power supply.For the bigger supply unit of power, IGBT opens shutoff can produce very strong radiated interference and conducted interference, and this has proposed strict demand for the EMC Design of system.This superconducting magnet power supply makes the storage capacitor, IGBT etc. of main power circuit all be crimped under the lamination copper bus-bar in the structural design of device, and into and out of line busbar also lamination line, thereby effectively reduced the circuit stray inductance, weaken the skin effect and the proximity effect of high-frequency current, reduced conducted interference and radiated interference.
This superconducting magnet power supply can adopt water cooling or forced air cooling. Its remarkable advantage is: can be superconducting magnetic Iron provides long-term current stability, height, voltage (electric current) ripple is low, response is fast, degree of regulation is high direct current Steady current. The volume of device is little, efficient is high, noise is little.
Claims (2)
1. superconducting magnet power supply, it comprises that four the tunnel have the igbt buck circuit A of closed-loop adjustment controller
8, A
9, A
10, A
11, it is characterized in that described four the tunnel have the igbt buck circuit A of closed loop controller
8, A
9, A
10, A
11For being arranged in parallel, closed loop controller is current-sharing closed loop controller A1, and described current-sharing closed loop controller carries out feedback control copped wave to buck circuit respectively.
2. a kind of superconducting magnet power supply according to claim 1 is characterized in that: described superconducting magnet power supply circuit is provided with total closed loop controller A2, and described total closed loop controller carries out feedback control to circuit integral body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202225781U CN201302893Y (en) | 2008-11-25 | 2008-11-25 | Superconducting magnet power supply achieved by IGBT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202225781U CN201302893Y (en) | 2008-11-25 | 2008-11-25 | Superconducting magnet power supply achieved by IGBT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201302893Y true CN201302893Y (en) | 2009-09-02 |
Family
ID=41086522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202225781U Expired - Lifetime CN201302893Y (en) | 2008-11-25 | 2008-11-25 | Superconducting magnet power supply achieved by IGBT |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201302893Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803306A (en) * | 2014-03-14 | 2014-05-21 | 沈阳隆基电磁科技股份有限公司 | Overturning electromagnet system for bundling machine |
| CN105048835A (en) * | 2015-08-28 | 2015-11-11 | 成都通用整流电器研究所 | Frequency-doubling and phase-shifting chopping plasma power supply of insulated gate bipolar translator (IGBT) for ignition of fire coal |
-
2008
- 2008-11-25 CN CNU2008202225781U patent/CN201302893Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803306A (en) * | 2014-03-14 | 2014-05-21 | 沈阳隆基电磁科技股份有限公司 | Overturning electromagnet system for bundling machine |
| CN105048835A (en) * | 2015-08-28 | 2015-11-11 | 成都通用整流电器研究所 | Frequency-doubling and phase-shifting chopping plasma power supply of insulated gate bipolar translator (IGBT) for ignition of fire coal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090902 |